--- product_id: 98540198 title: "P.i. Performance Improver" brand: "amsoil" price: "£39.23" currency: GBP in_stock: true reviews_count: 6 url: https://www.desertcart.co.uk/products/98540198-p-i-performance-improver store_origin: GB region: United Kingdom --- # Up to 5.7% fuel mileage boost Restores engine power & smoothness Cuts emissions by up to 26% P.i. Performance Improver **Brand:** amsoil **Price:** £39.23 **Availability:** ✅ In Stock ## Summary > ⛽ Unlock Peak Engine Power & Efficiency — Because Your Drive Deserves the Best ## Quick Answers - **What is this?** P.i. Performance Improver by amsoil - **How much does it cost?** £39.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/98540198-p-i-performance-improver) ## Best For - amsoil enthusiasts ## Why This Product - Trusted amsoil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Noise & Knock Silencer:** Diminish carbon rap and pre-ignition noise for a quieter, more refined driving experience. - • **Eco-Friendly Performance:** Slash harmful emissions—hydrocarbons down 15%, CO by 26%, NOx by 17%—drive cleaner, breathe easier. - • **Cost-Savvy Octane Solution:** Reduce reliance on expensive high-octane fuels without sacrificing performance or smoothness. - • **Engine Detox & Power Restore:** Deep cleans combustion chambers and injectors to revive lost horsepower and reduce engine knock. - • **Fuel Efficiency Game-Changer:** Boost your MPG by an average of 2.3%, with peaks hitting 5.7%—save more on every mile. ## Overview AMSOIL P.i. Performance Improver is a concentrated gasoline additive designed to clean combustion chambers, intake valves, and fuel injectors, improving fuel economy by up to 5.7% and significantly reducing emissions. Compatible with most cars and trucks, it restores engine power, reduces noise from carbon knock, and lowers the need for costly high-octane fuel. Ideal for maintaining peak engine efficiency and passing emissions tests, it’s a must-have for drivers who demand performance and eco-consciousness in one bottle. ## Description AMSOIL P.i. is the most potent gasoline additive available today. As a concentrated detergent, it is unsurpassed in cleaning combustion chamber deposits, intake valve deposits and port fuel injector deposits. AMSOIL P.i. helps maintain peak engine efficiency, fuel economy, power and drivability in newer low mileage engines. In engines with accumulated deposits, testing showed AMSOIL P.i. provided the following clean-up benefits after only one tank of gasoline: * Improves fuel mileage an average of 2.3% and up to 5.7% * Reduces emissions --hydrocarbons (HC) up to 15% --carbon monoxide (CO) up to 26% --nitrous oxides (NOx) up to 17% * Restores power and performance * Reduces the need for costly higher octane fuel * Reduces noise from carbon rap and pre-ignition Recommendations: Treat one full tank of gas up to 20 gallons with one bottle of P.i. For very large gas tanks, partially fill to 40 gallons and treat with two bottles of P.i. Using more than two bottles per treatment is not recommended. Treat gas every 4,000 miles of service (or 100 hours for marine, stationary and off-road gasoline-powered engines). P.i. helps pass emission tests by running one tank of treated fuel through the engine prior to testing. Safe for use with catalytic converters, oxygen sensors, oxygenated gas and 10 percent ethanol blended gas. Not recommended for two-cycle engines. Review: Would recommend - Good, high quality PEA (polyetheramine) rich fuel cleaner. I've been running it every 6,000-8,000 (every engine oil and filter service) for about the last 50,000 miles or there about in my motor, which is now on over 295,000 miles. A 1.6 petrol ford focus. Review: Good stuff! - Engine was running a bit off and according to the scan tool I got it was running too lean at mid range for the Fiat 1.4 engine. Put this in half tank (wot work with full tank I tried this before) high octane Shell VPwr E5 fuel then went for a long drive. Filled up with E10 She’ll Fuelsave the leaning out has reduced and is running smoother. ## Features - Causes serious eye damage. - Causes severe skin burns and eye damage. - Harmful if swallowed. - Harmful to aquatic life with long lasting effects. - May be fatal if swallowed and enters airways. - May cause drowsiness or dizziness. - Improves fuel mileage an average of 2.3% and up to 5.7% - Reduces emissions - Restored power and performance - Reduced need for costly higher octane fuel - Reduced noise from carbon rap and pre-ignition ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004LEPJQQ | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | 164,419 in Automotive ( See Top 100 in Automotive ) 567 in Fuel Systems | | Brand | Amsoil | | Brand Name | Amsoil | | Compatible with Vehicle Type | Car, Truck | | Container Type | Bottle | | Customer Reviews | 4.3 out of 5 stars 25 Reviews | | Flash Point | 70 Degrees Celsius | | Flash point | 70 Degrees Celsius | | Item Weight | 0.38 Kilograms | | Liquid Volume | 355 Millilitres | | Liquid volume | 355 Millilitres | | Manufacturer | AMSOIL | | Manufacturer Part Number | 097012280124 | | Model Number | 097012280124 | | Package information | Bottle | | UPC | 097012280124 | | Vehicle service type | Car, Truck | ## Product Details - **Brand:** Amsoil - **Flash point:** 70 Degrees Celsius - **Liquid volume:** 355 Millilitres - **Package information:** Bottle - **Vehicle service type:** Car, Truck ## Images ![P.i. Performance Improver - Image 1](https://m.media-amazon.com/images/I/61PpbC5YtgL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Would recommend *by M***W on 4 May 2026* Good, high quality PEA (polyetheramine) rich fuel cleaner. I've been running it every 6,000-8,000 (every engine oil and filter service) for about the last 50,000 miles or there about in my motor, which is now on over 295,000 miles. A 1.6 petrol ford focus. ### ⭐⭐⭐⭐⭐ Good stuff! *by N***H on 12 May 2022* Engine was running a bit off and according to the scan tool I got it was running too lean at mid range for the Fiat 1.4 engine. Put this in half tank (wot work with full tank I tried this before) high octane Shell VPwr E5 fuel then went for a long drive. Filled up with E10 She’ll Fuelsave the leaning out has reduced and is running smoother. ### ⭐⭐⭐⭐⭐ Works for me *by P***S on 6 April 2022* Ran Amsoil PI in our 2018 Infiniti QX 60 which per the specs gets up to 21/27 mpg city/highway. Well either this stuff really helps or our car is an excellent liar. Side note we do run 90 octane non ethanol gas in our cars as well. Update….ran this in my 2014 Lexus IS 250 F Sport. I wanted to see what i would get strictly on the highway. Reset my fuel mileage once i was in the freeway and my destination was 200 miles away. My F Sport is supposed to get 20 mpg city and up to 27 mpg highway. Well by the time i reached my destination my mpg said 29 mpg. That is 2 mpg above the top end of what my car is listed to get. I was impressed. I ran one bottle of Amsoil in a full tank initially. Once that tank got down to less than a quarter of a tank i put one more bottle of Amsoil in and filled up again (i use non ethanol gas only). Performance has been excellent! ## Frequently Bought Together - Amsoil P.i. Performance Improver - LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1 - Amsoil Signature Series Synthetic Engine Oil 5 W-30 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/98540198-p-i-performance-improver](https://www.desertcart.co.uk/products/98540198-p-i-performance-improver) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-25*